When you see a youtu.be link that means its the previe video immediately after upload (i.e. still processing before it makes the link official per say).
Quote:
Originally Posted by DigitalDawn
I just fixed it somehow. I think it had to do with line breaks. I added the video right after a line of text and that seemed to do the trick!
As you can see something was clearly inserting "3D" into the code, I believe it tried to resolve the youtu.be link but something went wrong. I would check to ensure this does not happen again because normally things just don't go wrong out of the blue - you know? .